131418640

素因数分解:

$2^4\times 5^1\times {\mathrm{647}}^1\times {\mathrm{2539}}^1$

素因数の和:3199

約数の個数: 40

約数和(自身を含む): 306141120

約数和(自身を除く): 174722480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 647, 1294, 2539, 2588, 3235, 5078, 5176, 6470, 10156, 10352, 12695, 12940, 20312, 25390, 25880, 40624, 50780, 51760, 101560, 203120, 1642733, 3285466, 6570932, 8213665, 13141864, 16427330, 26283728, 32854660, 65709320, 131418640]

約数ペア:

[(1, 131418640), (2, 65709320), (4, 32854660), (5, 26283728), (8, 16427330), (10, 13141864), (16, 8213665), (20, 6570932), (40, 3285466), (80, 1642733), (647, 203120), (1294, 101560), (2539, 51760), (2588, 50780), (3235, 40624), (5078, 25880), (5176, 25390), (6470, 20312), (10156, 12940), (10352, 12695)]